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Mathematics, 20.09.2021 14:00 zingchristina

the sum of three numbers is 20. the third is 12 more than 6 times the second. 9 times the first is 7 less than 7 times the second. Find the numbers

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the sum of three numbers is 20. the third is 12 more than 6 times the second. 9 times the first is 7...
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